Think and discuss: In this Gizmo, only one crossover is allowed in each segment. In reality, crossovers can occur at almost any point along the chromosome. How do the random distribution of chromosomes and crossovers create more variation in the resulting gametes?

Explanation:

Crossing over occurs in prophase-I during meiosis in which the exchange of genetic material takes place between non-sister chromatids of homologous chromosomes. As a consequence of this, each chromosome contains a new combination of genes.

After that, at the stage of anaphase-I, alleles of different genes get separated independently of one another into gametes. It results in the gametes with unique combination of chromosomes causing diversity in the traits.